package com.itheima.interceptor;

import com.itheima.constant.JwtClaimsConstant;
import com.itheima.context.BaseContext;
import com.itheima.properties.JwtProperties;
import com.itheima.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;
    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 校验jwt
     */
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getAdminTokenName());

//        Object status = redisTemplate.opsForValue().get("status");
//        if (status==null){
//
//            return false;
//        }else {
//            Long aLong = redisTemplate.getExpire("status", TimeUnit.SECONDS);
//            if (aLong<=5){
//                redisTemplate.expire("status", 60, TimeUnit.SECONDS);
//            }
//        }
//        //2、校验令牌
//        Long aLong = redisTemplate.getExpire("token", TimeUnit.SECONDS);
//        if (0<=aLong&&aLong<=10){
//            redisTemplate.expire("token", 60, TimeUnit.SECONDS);
//        }
//        Object token1 = redisTemplate.opsForValue().get("token");
//        if (token1==null){
//            throw new BaseException("token已过期");
//        }
//        long time = System.currentTimeMillis() + jwtProperties.getAdminTtl();


        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());
            log.info("当前员工id：{}", empId);
            BaseContext.setCurrentId(empId);
            // 3、通过，放行
            return true;
        } catch (Exception ex) {
            ex.printStackTrace();
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        BaseContext.removeCurrentId();
    }
}
